Nokia India — my phone screen is cracked while charging

Address:

560045

Hi,
I'm using nokia 6.1 plus and im seeing rapid charge or very slow charging when i keep for charging, but yesterday while charging my phone is cracked, means display started cracking all of sudden. Today i went to nokia care in koramanagala they said its physical damage and when i complained for nokia care they also told its a physical damage, but im thinking the cracking may be because of battery swelling. So i want you people to take it priority and check on this. What if phone blasts during charging will this considered under warranty or not?